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Grand Bornand, April 2011

Groningen, Spring 2011

Austin, Texas, November 2008

EAS, Jenam-Hatfield, April 2009

IAU-S277, Ouagadougou, December 2010

IAU Prague, August 2006

Spineto, Italy, June 2007

Rome, Vatican meeting, October 2007

The Sino-French meeting Beijing, April 2005

LARIM Pucon, Chile, December 2005

Ishigaki Japan, June 2006

Week of French Astrophysics SF2A-2003, Bordeaux 2003

The Conference Banquet, Gramado, Brasil, BH-SIGN, March 2004

Johan Knappen Birthday Bad Honnef, Germany, August 2004

With Judy Young, Roma, Italy, 2000

With Isaac Shlosman, La Palma, Canary Islands, 2001

ESO 40th birthday, Space City in Toulouse, November 2002

With Kepler and Tycho- -Brahe, Prague 1997

With Johan Knapen, at the Keck, Hawaii, 1998

With Rosemary Wyse, Aspen meeting, Colorado, January 1998

Talk at Erice, Sicily, "Astrofundamental" Septembre 1992

With Bruce Elmegreen, near 6m-telescope Zelentchuk, Russia, October 1993

Stellar Dynamics meeting Petrozavodsk, Russia, June 1995